Nut-lock.



A. F. BAR

NUT

v APPLICATION R ON.

Patenttsd June 19, 1917 DEC. 13. 1916.

m W a B f a UNITED STATES PATENT OFFICE.

ANDREW F. BARRON, OF WATERVBEIT, NEW YORK.

fNUT-LOGK.

Toxall whom it may concern:

Be it known that I, ANDREW F. Brannon, a citizen of the United States, residing at VVatervleit, in the county of Albany and State of New York, have invented certaln new and useful Improvements in Nut-Locks; and I do hereby declare the following to be 'a full, clear, and exact description 0f the 1nvention, such as will enable others skilled 1D. the art to which it appertains to make and use the same.

This invention has for its ()bJBCt to provide an improved nut structure embodying means for effectively locking the nut against removal from the bolt-,an'd which is also provided with means to facilitate retraction of the locking element from the bolt to permit removal of the nut.

With these and other objects in view,'t-he invention consists in the novel construction, combination and arrangement of parts as will be hereinafter specifically described, claimed and illustrated in the accompanying drawing, in which:

Figure 1-represents a transverse sectional view through a bolt and the improved nut lock, 1

Fig. -2 represcnts a side'elevation,

Fig. 3'is a plan, partly in section, of a modified form of the nut and the locking pawl separated,

Fig. 4 represents a plan View, partly in.

' section, of another modified form of the nut,

illustrating the type of locking pawl associated therewith,

Referring to the drawing in detail, the numeral 5 indicates a rectangular nut of the usual construction having the ordinary in tarnally screw threaded bore 6 receiving the threaded bolt 7, which latter is formed with a series of substantially V-shaped recesses defining radial shoulders or ratchet teeth, 8.

dial opening 9, communicating with the-bore in the recess 10, and is normally disposed in The nut 5 is formed with a substantially raat its inner end and with a recess 10 formed .inone side 'face-ofthe cut 5. One wall of the opening 9 is formed with a depression 11 constituting a seat.

A; locking'pawl 12 is pivotally secured at 13 in the'outer portion of the opening 9 and .is provided with an integral laterally projecting lug 14, which overlies the open end of the seat 11. The side of the pawl 12 opposite the lug 13 is formed with an elongated lateral extension 15, which is received with- Specification of Letters Patent:

Patented June 19, 1917.

Application filed December 13, 1916. Serial No. 136,864.

- on, and, during rotary movement of the nut,

the pointed inner terminal of the pawl 12 rides over the surface of the bolt and successively drops into the recesses or grooves 8. It is to be understood that the shoulders 8 are so disposed as tocooperate with the pawl 12 to lock the nut against removal from the bolt. The end wall and adjacent portion of one side wall of the recess 10, at a point adjacent theyfree end of the extension 15, are formed with recesses 10, which are disposed at right angles toeach other. When itis desired to purposely remove the nut, a

1 pointed tool is positioned in either one of the recesses or cavities 10 and inserted under the lateral extension 15, thus lifting the latter out of the recess 10 and swinging the inner terminal of the pawl 12 out of e11- gagement with the bolt 7 and permitting free movement of the nut.

Referring to the modification of the invention illustrated in Fig. 3 the numeral 20 indicates the nut' having the internally screw threaded bore 21 communicating with a sub stantially radial opening 22, which is of substantially the same shape as the opening 9 in Fig. 1. The side wallsof the opening 22' are slit to define fingers 23, which, before the application 01' the locking pawl to the nut, are directed outwardly, as illustrated in Fig. 4." At the base portions of the fingers 23, the walls of the opening 22 are formed with recesses 24 to accommodate the pivot "pin\25 which is loosely fitted slot 26 formed in the locking awl 27. In applying the pawl. to the nu the pin 25 is posi- 'tioned in the slot 26 in the pawl 27 and the latter is inserted in. the opening 22,,the pin '25 lying in the racemes 24. Subsequent to the application of the pin to the recesses 24 the fingers 23 are bent inwardly against the body of the nut 20, thus rigidly holding the pin in position and pivot-ally securing the pawl 27 in the ope1'1ing 22. It will be understood that the pawl is normally retained in engagement with the radial shoulders or ratchet teeth of the bolt by a spring similar to that shown in Fig. 1 and the pawl is so constructed that when the inner terminal thereof is moved out ofengagement with the bolt, no part of the pawl lies outside of the side faces of the nut.

In the modification of the invention illustrated in Fig. 4, the locking device is shown applied to a hexagonal nut in which is formed an opening similar to the opening 9 in the form of the invention illustrated in Figs}. and2, and receiving the locking pawl 12, which is also identical to the corresponding part of the nut lock previously described. The locking element is pivotallyseeured at I? in the opening and is normally retained in, engagement with the bolt by the tension of the coil spring 16 and it may be conveniently disengaged from the bolt by outward pressureexerted upon the lateral extension 15 thereof.

What I claim is:

1. A nut lock including a bolt provided with longitudinalshoulders, a nut fitted on said bolt l'ia'ving an opening communicating with the bore and a recess formed in one face thereof and communleatlng wlth the opennig 'a locking pawl pivotally secured in said opening and adapted to engage said shoulders to lock. the nut against rotational I movement in one direction upon the bolt, a

lateral extension formed integral with the pawl and adapted to be received within the recess, said recess having angularly disposed cavities formed in the walls thereof and at points adjacent the free end of the lateral extension to facilitate insertion of a tool under the extension to release. the locking pawl,

a laterally'projecting lug formed on said pawl in opposed relation to the extension.

and spring means engagin', said lug and normally retaining the pa l in engagen'ient with the bolt.

A nut lock including a bolt having longitudinal shoulders thereon, a nut fitted on said bolt having an opm'iing therein, and recesses formed in the-walls of the opening, a pivot pin engaged in said. recesses and extending transversely ,throliigh the opening, fingers struck out fronrsaid nut and adapted to be bent over the pin to secure the latter in. position in the recesses, and a spring actuated locking pawl pivotally supported 

